Mobile paint tray



FIG. 1 is a prespective top view of a mobile paint tray showing my new design;

FIG. 2 is a rear elevational view of a mobile paint tray showing my new design;

FIG. 3 is a front view of a mobile paint tray showing my new design;

FIG. 4 is a prespective side view of a mobile paint tray; and,

FIG. 5 is a bottom view of a mobile paint tray showing my new design. 

The ornamental design for a mobile paint tray, as shown and described. 